Two of my friends were quite intoxicated last night when they noticed my car parked somewhere. They proceeded to (charmingly, but f---ing annoyingly) write s--- all over the bonnet, windscreen and windows of my car with thier lippy.

lol @ yetis
The lippy is mostly gone now, left a bit of a pinkish tinge, but seems to be water repellant. A bonus? Who can say...
It's not 100% gone from the glass though, f---ing annoying. Pics to follow later todaye when I get home.